# Copyright 2019 Google, LLC.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# [START cloudrun_pubsub_dockerfile]
# [START run_pubsub_dockerfile]

# Use the official Python image.
# https://hub.docker.com/_/python
FROM python:3.9 AS base

# Allow statements and log messages to immediately appear in the Cloud Run logs
ENV PYTHONUNBUFFERED True

# Copy application dependency manifests to the container image.
# Copying this separately prevents re-running pip install on every code change.
ENV APP_HOME /app
WORKDIR $APP_HOME
COPY requirements.txt ./

RUN python -m venv /opt/venv
# Install production dependencies.
RUN . /opt/venv/bin/activate && \
  /opt/venv/bin/python -m pip install --upgrade pip && \
  /opt/venv/bin/pip install -r requirements.txt
# Copy local code to the container image.
COPY . ./


# App
FROM python:3.9-slim AS app
COPY --from=base opt/venv /opt/venv
ENV APP_HOME /app
WORKDIR $APP_HOME
COPY --from=base /app ./
# Run the web service on container startup.
# Use gunicorn webserver with one worker process and 8 threads.
# For environments with multiple CPU cores, increase the number of workers
# to be equal to the cores available.
CMD . /opt/venv/bin/activate && \
  exec gunicorn --bind :$PORT --workers 1 --threads 8 --timeout 0 main:app

# [END run_pubsub_dockerfile]
# [END cloudrun_pubsub_dockerfile]
